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Which of the following reaction does not occur in Bessemer's converter?
$2C{u_2}S\, + \,5{O_2}\, \to \,2CuS{O_4} + \,2CuO$
$2C{u_2}S\, + \,3{O_2}\, \to \,2C{u_2}O + \,2S{O_2}\, \uparrow \,$
$2CuFe{S_2}\, + \,{O_2}\, \to \,C{u_2}S + \,\,2FeS\, + \,S{O_2}$
$FeO\, + \,Si{O_2}\, \to \,FeSi{O_3}$
Solution
In the extraction of copper, following reactions occur in Bessemer converter:
$2 \mathrm{Cu}_{2} \mathrm{S}+3 \mathrm{O}_{2} \rightarrow 2 \mathrm{CuO}+2 \mathrm{SO}_{2}$
$\mathrm{Cu}_{2} \mathrm{S}+2 \mathrm{Cu}_{2} \mathrm{O} \rightarrow 6 \mathrm{Cu}+\mathrm{SO}_{2}$
$2 \mathrm{Cu}_{2} \mathrm{S}+5 \mathrm{O}_{2} \rightarrow 2 \mathrm{CuSO}_{4}+2 \mathrm{CuO}$
$2 \mathrm{Cu}_{2} \mathrm{S}+\mathrm{Cu}_{2} \mathrm{SO}_{4} \rightarrow 4 \mathrm{Cu}+2 \mathrm{SO}_{2}$
$\mathrm{FeO}+\mathrm{SiO}_{2} \rightarrow \mathrm{FeSiO}_{3}$
Roasting takes place in a furnace in the presence of a current of air. In this process, $2 \mathrm{CuF} \mathrm{eS}_{2}+\mathrm{O}_{2} \rightarrow \mathrm{Cu}_{2} \mathrm{S}+2 \mathrm{F} \mathrm{eS}+\mathrm{SO},$ reaction takes place.
